JPH065355U - Support device for lead wire in motor - Google Patents

Abstract

(57) [Abstract] [Purpose] A lead wire 8 for externally supplying electric power to the terminal pin 23 to which the end of the winding of the winding frame of the motor is attached.
It facilitates the work of soldering. A terminal holder is provided on the outer end surfaces of the flanges of a pair of synthetic resin winding frames, and terminal pins 23 project from the terminal holder at a constant pitch (P1). Each terminal pin 2
Solder the end of the winding to 3. On the other hand, the bearing support plate 5 and the support body 7 of the motor are integrally molded with an electrically insulating synthetic resin. Guide holes 31 are formed in the support body 7 at the above pitch, the lead wires 8 are inserted into the guide holes 31, and the tip portions 8a of the lead wires 8 are brought into contact with or close to the side surfaces of the terminal pins 23. Hold the condition and solder both.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-lead wire supporting device for connecting a terminal pin wound around an end of a winding of a stator of a motor such as a step motor and a lead wire for supplying electric power from the outside. is there.

[0002]

[Prior art]

 A configuration in which a pair of winding frames of a stator positioned on the outer circumference of a rotor in a step motor or the like are arranged side by side in the axial direction of the motor is well known in, for example, JP-A-1-107631 of the prior art. In this case, as disclosed in the publication, flange portions are provided on the pair of winding frames so as to face each other, and the outer end surfaces of the flange portions extend in the half-diameter outer direction of the winding frame. A plurality of terminal holders each having a substantially rectangular cross section are integrally formed in a substantially circumferential direction of the flange portion at a predetermined pitch. After the end of the winding is wound on the tip surface of this terminal holder, a plurality of metal rod-shaped terminal pins for solder connection are erected so as to project outward in the radial direction of the flange. The pair of winding frames are arranged so that the terminal holders mesh with each other. As a result, a plurality of terminal pins are arranged in series.

In addition to soldering the ends of the windings to each of the terminal pins, a lead wire for supplying electric power from the outside is soldered to each of the terminal pins. I try to pull it out of the data case.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned prior art, after inserting a predetermined number of lead wires into a holding cover that is detachably attached to the motor case, when soldering the ends of the lead wires to the terminal pins, There was a problem that workability was extremely poor because the wire could not be positioned.

In order to solve this inconvenience, the applicant of the present invention previously disclosed in Japanese Patent Application No. 3-161734 by inserting a connector housing of a commercially available product into a clamping piece protruding to the outside of the motor case, and mounting the connector housing. A configuration is adopted in which the pins protruding in a line from the connector housing are brought into contact with the side surfaces of the terminal pins and soldered together. However, using this connector housing has a problem that the manufacturing cost increases.

An object of the present invention is to provide a lead wire supporting device in a motor which is inexpensive and can improve soldering workability.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a plurality of metal members for winding windings in a coil shape on a winding frame located on the outer periphery of a rotating rotor and winding the ends of the windings on the winding frame. In a motor having a terminal pin made upright and provided with a lead wire for supplying external power to the terminal pin, a supporting body for supporting the lead wire is provided in an exterior part such as a motor case. The support is provided with a guide hole through which the tip of the lead wire can be inserted toward the terminal pin.

[0008]

【Example】

 Next, an embodiment embodying the present invention will be described. FIG. 1 is a side sectional view of a step motor. A motor case 1 of the step motor is formed by welding a frame portion 2 in which a metal plate is bent into a C-shaped tube and an opening at both ends of the frame portion 2 by welding or the like. It is formed in a hollow shape by a pair of fixed end plates 3 and 4.

On the inner surface side of the rear end plate 4, an electrically insulating synthetic resin shaft for holding a bearing 6 that rotatably supports a motor shaft 11 of a rotor (rotor) 10 described later. The bearing support plate 5 is attached, and the bearing support plate 5 can be produced in one step by a process such as insert molding in a state in which the bearing 6 is fitted in a molding die. On the inner surface side of the front end plate 3, a spacer portion 12 is formed by extending a hard synthetic resin (for example, PBT: polybutylene terephthalate etc.) for integrally fixing a stator 9 described later to the radius center side. Is intervening. A bearing 13 is fixed to the center of the radius of the spacer portion 12. The spacer portion 12 and the bearing support plate 5 electrically separate the pair of yokes 14 and 15 in the rotor 10 and the stator 9 from each other. It is supposed to be done. The both bearings 6 and 13 are formed by impregnating a porous material with lubricating oil, for example, pressure-molding an iron-based or copper-based powder material and then impregnating the lubricating oil. .

The rotor (rotor) 10 is provided at the center of a cylindrical rotor body 25 made of a mixture (glass fiber reinforced plastic) of hard synthetic resin material (for example, PBT: polybutylene terephthalate) and short glass fibers. The motor shaft 11 is positioned, and the outer peripheral surface of the rotor body 25 is integrally molded so that a cylindrical magnet 26 having a large number of magnetic poles is positioned (see FIG. 3). At this time, the both ends of the rotor body 25 are integrally molded so that the thin disk-shaped washers 27, 28 are interposed at positions facing the end faces of the bearings 6, 13. The synthetic resin material of the washers 27, 28 has lubricity, for example, an acetal resin (crystalline thermoplastic homopolymer made by polymerization of formaldehyde) mixed with a chemical lubricant.

Further, the stator 9 has a pair of yokes 14, 15, 16, 17 provided with a plurality of comb-shaped magnetic poles 18 extending in the axial direction of the motor shaft 11 alternately along the circumferential direction, The pair of yokes 14 and 15 facing each other and the winding frames 19 and 20 positioned on the outer periphery of the yokes so as to be sandwiched between the yokes 16 and 17 of another pair, respectively (see FIG. 2). The ends of the windings 21 wound around the outer circumferences of the winding frames 19 and 20 made of thermoplastic synthetic resin and having a substantially U-shaped cross section have terminal holders 22 formed integrally with the flanges 19a and 20a of the winding frames. It is wound around a plurality of terminal pins 23 (3 in the embodiment, 6 in total), and the concavo-convex portions of the terminal holder 22 are engaged with each other so as to face each other in the yokes 15 and 16. The outer surfaces of the flange portions 15a and 16a are aligned with each other.

In this aligned state, a gap between the magnetic pole 18 of the pair of yokes 14, 15, 16 and 17 and the inner peripheral surfaces of the winding frames 19 and 20 is filled with an electrically insulating hard synthetic resin material 24. , But they are fixed integrally (however, FIG. 3 shows only the bobbin 19 having one pair of yokes 14 and 15). As shown in FIG. 5, the terminal holder 22 is integrally formed on the outer end surfaces of the facing flange portions 19a, 20a, and has a width dimension (P1) for holding the base portion of each terminal pin 23. 3) has a substantially rectangular cross-section, and when the outer surfaces of the terminal holders 22 and 22 of the bobbins 19 and 20 are aligned with each other, the holding portions 30 are appropriately fixed so that they fit together. Are arranged in a horizontal row at the pitch (P1).

When the reels 19 and 20 are molded, insert molding is performed with the base of the terminal pin 23 embedded in the holding portion 30. Further, by forming the side surface of the holding portion 30 at the center position among the three holding portions 30 arranged in each winding frame to be the center position, the pair of winding frames 19 and 20 can be formed in a bilaterally symmetrical shape. It is possible to form one pair of reels 19 and 20 in which the concavo-convex portions of the terminal holder 22 can be fitted with each other by reversing one of the reels made by the same mold.

The tip of a lead wire 8 for supplying electric power to the motor from outside is soldered to each of the terminal pins 23. In this case, the middle part of each lead wire 8 should be supported by the support body 7 in the exterior part of the motor case 1, and the tip part (metal wire part) of each lead wire 8 should be close to the side surface of each terminal pin 23. It has a guide hole that allows Then, the lead wire 8 is drawn out of the motor case 1 from the position of the support 7.

In the present embodiment, the bearing support plate 5 made of an electrically insulating synthetic resin material is integrally provided with a support body 7. As shown in FIGS. 4 and 6, the support body 7 includes: The guide holes 31 are formed laterally at the same pitch (P1) as the arrangement interval (P1) of the terminal pins 23. The diameter of the guide hole 31 is made slightly larger than the outer diameter (D1) of the covering portion of the lead wire 8 so that the tip of the lead wire 8 can be easily inserted into the guide hole on the outer end face side of the support 7. A guide portion 32 having a conical shape is formed on the.

With this configuration, the winding wire 21 is wound around each winding frame 19 and 20 in a coil shape, and the end portion of the winding wire 21 is wound around the root portion of the terminal pin 23 to form the winding portion 23a. Then, after the root of the terminal pin 23 is soaked in the liquid surface of the molten solder in a solder bath (not shown) until the root of the terminal pin 23 is pulled up, the winding portion 23a is soldered. At the same time, the outer peripheral surface of each terminal pin 23 is covered with a solder metal film, which facilitates the soldering work of the lead wire 8 and the terminal pin 23 in the subsequent step.

Then, the lead wire 8 having the coating of the designated color is inserted into the inner hole 31 of the support body 7, the midway part of each lead wire 8 is stably supported, and The tip (metal wire) portion 8a of the lead wire 8 can be held in a state of approaching or contacting the side surface of each terminal pin 23. In this state, each terminal pin 23 and the tip portion 8a of the lead wire 8 may be connected by soldering. Reference numeral 33 is a cover body for covering an upper portion of the connecting portion between the terminal pin 23 and the tip portion 8a of the lead wire.

The tip 8a of the lead wire 8 inserted and supported in advance by the support 7 is held in a state of being brought close to the side surface of each terminal pin 23, and the tip of each terminal pin 23 faces downward. By soaking in the molten solder 34 in the solder bath 33, the lead wire 8, the terminal pin 23 and the winding portion 23a can be soldered at the same time. In the above embodiment, the support 7 is integrally formed with the bearing support plate 5, so that the manufacturing process can be simplified.

In the embodiment shown in FIG. 7, the support 7 made of an electrically insulating synthetic resin material is inserted and locked into the edge of the end plate 4 of the motor case 1. Instead of this configuration, The support 7 may be configured to be detachably attached to an outer portion of the motor case or the like at an appropriate position near the terminal pin 23. Thus, unlike the conventional connector housing, the support of the present invention has only the guide hole 31, so that the structure is simple and the manufacturing cost is low. Needless to say, the present invention can be applied to other types of motors other than step motors.

[0020]

[Operation and effect of the device]

 INDUSTRIAL APPLICABILITY As described above, according to the present invention, a winding wire is wound in a coil shape on a winding frame located on the outer circumference of a rotating rotor, and a plurality of metal members for winding the ends of the winding wire around the winding frame are provided. In a motor having terminal pins made upright and provided with lead wires for supplying external electric power to the terminal pins, a support body for supporting the lead wires is provided in an exterior part such as a motor case, The support is formed with a guide hole through which the tip of the lead wire can be inserted toward the terminal pin. With this configuration, the middle part of the lead wire is stabilized in the guide hole of the support. Since it can be supported in a state, the lead wire and the terminal pin can be stably soldered.

As a result, the present invention has a remarkable effect that the motor assembling work can be executed significantly efficiently and the motor production efficiency can be improved. Further, since the structure of the support is simple, the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a motor.

FIG. 2 is an exploded perspective view of parts of a stator.

FIG. 3 is a partial perspective view of a rotor and a stator.

FIG. 4 is a view taken along the line IV-IV of FIG.

FIG. 5 is a perspective view of a main part of a terminal holder.

FIG. 6 is a perspective view of a support.

FIG. 7 is a side sectional view of a second embodiment of the support.

[Explanation of symbols]

 1 Motor Case 3,4 End Plate 5 Bearing Support Plate 6,13 Bearing 7 Support 8 Lead Wire 10 Rotor 11 Motor Shaft 19,20 Winding Frame 19a, 20a Flange Part 21 Winding 22 Terminal Holder 23 Terminal Pin 23a Winding Part 30 holding part 31 guide hole 32 guide part

Claims (1)

[Scope of utility model registration request] 1. A coil is wound around a winding frame located on the outer periphery of a rotating rotor, and a plurality of metal terminal pins for winding the ends of the winding are wound around the winding frame. In a motor provided with a lead wire for supplying external electric power to the terminal pin, a support body for supporting the lead wire is provided on an exterior part such as a motor case, and the support body is provided with A lead wire support device in a motor, wherein a guide hole is formed at a tip of the lead wire so as to be inserted toward the terminal pin.